y=ln√1-2x,求dy/dx!结果是-1/1-2x怎么来的(lnx)’=1/x着我知道,(√1-2x)’着个导数呢!(1-2x)’的导数呢!是3个相承吗!
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![y=ln√1-2x,求dy/dx!结果是-1/1-2x怎么来的(lnx)’=1/x着我知道,(√1-2x)’着个导数呢!(1-2x)’的导数呢!是3个相承吗!](/uploads/image/z/6931375-7-5.jpg?t=y%3Dln%E2%88%9A1-2x%2C%E6%B1%82dy%2Fdx%21%E7%BB%93%E6%9E%9C%E6%98%AF-1%2F1-2x%E6%80%8E%E4%B9%88%E6%9D%A5%E7%9A%84%28lnx%29%E2%80%99%3D1%2Fx%E7%9D%80%E6%88%91%E7%9F%A5%E9%81%93%EF%BC%8C%EF%BC%88%E2%88%9A1-2x%EF%BC%89%E2%80%99%E7%9D%80%E4%B8%AA%E5%AF%BC%E6%95%B0%E5%91%A2%EF%BC%81%EF%BC%881-2x%EF%BC%89%E2%80%99%E7%9A%84%E5%AF%BC%E6%95%B0%E5%91%A2%EF%BC%81%E6%98%AF3%E4%B8%AA%E7%9B%B8%E6%89%BF%E5%90%97%EF%BC%81)
y=ln√1-2x,求dy/dx!结果是-1/1-2x怎么来的(lnx)’=1/x着我知道,(√1-2x)’着个导数呢!(1-2x)’的导数呢!是3个相承吗!
y=ln√1-2x,求dy/dx!
结果是-1/1-2x
怎么来的
(lnx)’=1/x着我知道,(√1-2x)’着个导数呢!(1-2x)’的导数呢!是3个相承吗!
y=ln√1-2x,求dy/dx!结果是-1/1-2x怎么来的(lnx)’=1/x着我知道,(√1-2x)’着个导数呢!(1-2x)’的导数呢!是3个相承吗!
y=ln√(1-2x)
dy/dx
= [1/√(1-2x)] d/dx{√(1-2x)}
= [1/√(1-2x)] .-2/[2√(1-2x)]
= -1/(1-2x)
z= 1-2x
d/dx{√(1-2x)}
=d/dxz^(1/2)
=1/(2√z) .dz/dx
=1/(2√z) d/dx(1-2x)
=-1/√z
=-1/√(1-2x)
dy=1/√(1-2x)d√(1-2x)
=1/√(1-2x)*1/[2√(1-2x)] d(1-2x)
=1/[2(1-2x)]*(-2dx)
=dx/(2x-1)
dy/dx=1/(2x-1)
因为lnx求导等于1/x.
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